And yes -- Jamie was clearly written as a white Jew from Manhattan -- see the reasons why above -- and my original post DOES say they are black Jews. But the odds of them singing the "Schmuel Song" about a European Jewish shtetl -- or singing Shiksa Goddess, are likely quite low.
Further, I am not saying it should only be white actors. I'm not. I'm saying there is a REASON it usually is -- something the author totally omits from her post.